mCover iPearl Hard Shell Case for 13" Model A1237 / A1304 MacBook Air - GREEN Made of high-quality USA-made DOW polycarbonate material, which is shatter-proof and will protect your 1st Generation 13.3" MacBook Air A1237 / A1304 all around. NOT compatible with latest 13.3" MacBook Air, model A1466 (with part number MD231LL/A or MD232LL/A) released in June 2012 and 2nd Generation 13.3" MacBook Air, model A1369 (with part number MC503LL/A or MC504LL/A or MC965LL/A or MC966LL/A). Retractable feet on the rear side to let you type more comfortably. It also helps your MacBook Air to stay cool. Rubber feet on the front side to prevent from slipping on smooth surface. 2-piece light-weight (12.3 OZ) shell easily snaps on and off. All ports and charging port are accessible.